Hoist.



No. 794,997. I PATENTEDJULY 18, 1905.

E. Y. MOORE.

HOIST.

APPLICATION FILED 1330.12, 1904.

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No. '794,997- PATENTE D JULY 18, 1905.

E. Y. MOORE.

HOIS'I'.

APPLICATION FILED D30. 12, 1904.

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PATENTED JULY 18, 1905.

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HOIST. APPLICATION FILED D30. 12, 1904.

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UNITED STATES Patented July 18, 1905.

EDWARD Y. MOORE, OF CLEVELAND, OHIO.

HOIS'T.

SPECIFICATION forming part of Letters Patent No. 794,997, dated July 18,1905. Application filed December 12, 1904. Serial No. 236,424.

To ztZZ whom, it may concern:

Be it known that LEDWARDX. MOORE, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Hoists,of which thefollowing is a full, clear, and exact description, referencebeinghad tothe accompanying drawings.

Hoists in order to be self-sustaining and at the same time eflicientmust have some brake mechanism operating to prevent the descent of theload, but not interfering with the raising thereof, for if the ordinaryfriction of the hoist itself is relied upon to prevent the loaddescending the efliciency in raising is correspondingly reduced.

The object of this invention is to provide a hoist with very efficientbrake mechanism preventing the load descending without interfering withthe elevation thereof. The invention is hereinafter more fullydescribed, and its essential characteristics set out in the claims.

The drawings show my invention embodied in a hoist of the general typecovered by my Patent No. 7 57 ,333, issued April 12, 1904.".

Figure 1 is a vertical central section of the hoist complete. Fig. 2 isa side elevation thereof looking from the side opposite the hand-wheel.Fig. 3 is a plan of the hoist. Fig. I is a vertical section on the line4 4 of Fig. 1 looking to the right. Fig. 5 is a vertical section of thehoist on the inner side of the hand-wheel, showing the brake. Fig. 6 isa side elevation of the brake-cup with the friction-disks removed. Figs.7 and 8 are views of the fiber and metal disks of the brake,respectively. Fig. 9 is a view of the coverplate of the brake. Fig. 10is a perspective view of the collar which carries the brake.

Fig. 11 is a perspective view of the cam-collar by which the brake isset; and Fig. 12 is a view of the locking-nut, broken away to show theclutch collar and shaft.

The frame of the hoist, as shown, consists of two side members A A,secured together at their ends. Between these members is secured across-head B, to which is swiveled the supporting-hook O. Between theside members of the frame is the lifting-chain pulley D, which is shownas rotatably mounted on a sleeve G, carried by the frame members A A,and itself forming a portion of the frame.

Formed on the exterior of the main pulley D is an external gear (Z, andsurrounding this gear is a yoke-piece E, which has internal teeth 0 of agreater number than the gear d. The yoke-piece is given an orbitalnon-rotative movement by a pair of eccentrics K K on shafts J J,journaled in the frame and carrying on their ends gears L L, with whichmesh a gear H on the end of the main driving-shaft F. It thus resultsthat when this main driving-shaft is rotated, as by means of thehand-wheel N, the yoke E is gyrated and the gear d and main pulley D isgiven a slow rotation. Frictionrollers M may be employed between theeccentrics and the yoke, as shown.

The construction above described is set out more at length and claimedin my prior patent above mentioned, to which reference is hereby madefor a fuller description.

In order to prevent the load descending, I provide the brake mechanism,which is the essential feature of the present invention, and which willnow be described.

Rigidly mounted on the main shaft F outside of the frame member A is acollar P. (Shown more particularly in Fig. 10.) This collar has a flangep, which rests against the frame-plate A. Immediately outside of theflange is a cylindrical portion 12, and outside of this is a squareportion p with rounded corners. Mounted on this collar P, bearingagainst its flange p and surrounding its cylin drical portion, is ametal cup Q. This cup has a flat circular interior surface q,surrounding which is a cylindrical wall 9. Within the cup are series ofalternately-placed fiber and metal disks. The fiber disks are designatedS. Each is bounded by a circle and has a square central hole adapted totake over the square portion p of the collar P, Wherefore the fiberdisks are compelled to rotate when the shaft F rotates. Alternating withthe fiber disks are one or more metal disks R. The metal disks havecircular holes which bear on the rounded corners of the squareprojection p ,.while at their peripheries they have short projectingwings 0 which are adapted to oc cupy recesses (J2 in the wall of thecup. The various disks are retained in place within the cup Q by a metalcover -plate T within the wall of the cup and having circular holesurrounding the boss 19 The plate has at its periphery wings t, whichextend across notches or recesses 9 formed in the wall of the cup.Within these notches are springs V, bearing on the wings t and tendingto press the coverplate outward. Holes S in the fiber disks carrygraphite or other suitable lubricant. The cover-plateT is held in placeby the handwheel N, which bears against its outer surface. Thishand-wheel is free to turn slightly on the shaft. On the hub 91/ of thehandwheel are formed a pair of oppositely-placed inclines if withinnotches n Secured by a feather w to the shaft F is a collar W, which hasa pair of lugs w, adapted to stand within the notches n. The faces ofthese lugs are beveled complementary to the beveling of the inclines of.There is some play between the sides of the lugs w and the notches whichthey occupy, wherefore the hand-wheel is allowed slight independentmovement. Such movement of the hand-wheel forces thehandwheel inward byreason of its inclinations a riding up on the inclinations w, and thisforcesthe cover-plate T snugly against the disks, pressing them againsteach other to effect braking. The cam-collar is adjusted in position bythe nut X, locked in place by the setrscrew On the periphery of the cupQ are formed ratchet-teeth g and with these teeth engages 'a pawl Y,pivoted to the frame member A and forced by a spring y into engagementwith the ratchet-teeth. This pawl and the ratchet-teeth are placed insuch direction that .the cup Q can rotate idly beneath the pawl whenturned in the direction in which the shaft turns to elevate the load.The inclinations 01 and w are in such direction that when the hand-wheelis turned to elevate the load the hand-Wheel is forced inward by theinclinations, which movement clamps the disks and causes the cup Q torotate, the pawl Y clicking idly over the teeth Q. When the load hasbeen elevated and the raising rotation of the hand-wheel ceases, theload tending to run down holds the brake set as before; but the pawl Yprevents the cup Q rotating in the opposite direction, and the load isthus held at whatever point it may be. When it is desired to lower theload, the handwheel is turned in the reversedirection, which causes itsinclinations n to travel down the inclinations w of the collar W,releasing the brake and allowing the load to descend. During descensionthe hand-wheel, by means of its chain, is always kept in advance of theload. To stop the descent, the movement of the hand-wheel issimplystopped, and the load thus turns the shaft F, moving the camprojections w on the inclines 17, and thus forcing inward the hand-wheeland resetting the brake.

The above-described mechanism provides a very eflicient automatic brakeand one that is durable and not liable to get out of order. The fiberand metal disks are capable of long wear and are easily replaced whenworn out. The lubrication of the disks by the graphite insures the brakebeing regular in its action, preventing jerking as well as heating andcutting.

I claim 1. In a hoist, in combination,hoisting mechanism, adriving-shaft therefor, a friction member rotatable around the shaft,friction-disks surrounding the shaft, one of which is held near itsperiphery by said member and another of which is held near its center bya non-circular contour on said shaft, means for rotating the shaft, andmeans operated thereby for compressing said disks.

2. In a hoist, in combination, hoisting mechanism,a driving-shafttherefor, a collar on said shaft having an angular portion, a cupjournaled on said collar, a series of disks within the cup and mountedon said angular portion, said disks being alternately held by theangular portion and by the wall of the cup, means controlling saidshaft, and means operated thereby for compressing said disks.

3. In a hoist, in combination, arotatablymounted cup, means forpreventing its rotation in one direction, a series of disks within saidcup, one of said disks having wings occupying recesses in the wall ofthe cup, another of said disks being rotatable independently of saidcup, hoisting mechanism, and driving mechanism therefor adapted torotate said independently-rotatable disk and press said disks together.

4. In a hoist, in combination, a rotatablymounted cup, means forpreventing its rotation in one direction, a series of disks within saidcup, one of said disks having wings occupying recesses in the wall ofthe cup, a shaft extending through said cup and carrying another disk,hoisting mechanism operated by said shaft, a hand-wheel on said shaft,and means whereby the rotation of the hand-wheel may cause it to presssaid disks.

5. In a hoist, in combination, a frame, a shaft carried thereby,hoisting mechanism 0p erated by said shaft, a hand-wheel loose upon saidshaft, a collar upon the shaft and connected with it, said collar andhand-wheel havingcooperatingprojectionsandnotchesloosely receiving themand having cooperating inclined faces whereby the rotation of the hand-Wheel relative to the collar may force the hand-wheel along the shaft, abrake adapted to be engaged by such movement of the handwheel, saidbrake consisting of a series of disks and a containing-cup, the disksbeing connected alternately with the shaft and the toward the disks.

7 The combination of a rotatably-mounted cup, a shaft placed axially ofsaid cup and rotatable independently thereof, disks within the cupalternately connected with said shaft and cup, a cover-plate forcompressing said disks, and a hand-wheel adapted to force saidcover-plate toward the disks, said cover-plate having projecting wingsoccupying recesses in the wall of the cup, and springs occupying suchrecesses and engaging such wings and tending to force the cover-plateaway from the disks.

8. In a hoist, in combination, a frame, a

. shaft journaled therein, lifting mechanism driven thereby, said shaftcarrying an angular portion with rounded corners, a series of diskssurrounding the shaft, said disks being alternately rotatable on therounded corners of said shaft and connected with the shaft by means ofits angular portion, means for holding against rotation one of the disksfree from the shaft and means for compressing said disks.

9. In a hoist, in combination, a driving-shaft carrying an angularportion with rounded corners, a series of disks surrounding the shaft,said disks being alternately rotatable on the rounded corners of saidshaft and connected with the shaft by means of its angular portion,means for holding against rotation one of the disks free from the shaft,a cam-collar on the shaft, and a hand-wheel on the shaft engaging thecollar and adapted to be forced toward the disks when rotated relativeto the collar.

10. In a hoist, in combination, a frame, a shaft journaled therein,lifting mechanism driven thereby, a friction-brake, a cam-collar on theshaft, a hand-wheel on the shaft engaging the collar and adapted to beforced toward the brake when rotated relative to the collar, said collarbeing compelled to rotate with the shaft but slidable upon it, and a nutscrewthreaded onto the shaft and adapted to adjust the collar.

11. In ahoist,in combination, a frame,hoisting mechanism carriedthereby, a frictionbrake for the mechanism including a cup having a fiatinterior face and a surrounding wall with a recess in it, disks withinsaid cup, one of which has a projection on its periphery occupying suchrecess, and a presser-plate for said disks, said plate occupying saidcup and having wings extending into recesses in the wall thereof, andsprings engaging said wings and tending to force said presser-plate outof the cup.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

EDWARD Y. MOORE.

Witnesses:

ALBERT I-I. BATES, L. N. BRESNAN.

